Ouder G3.— UMBELLIFER^E. 387 



•erect. Lvs. finely divided. Umbels pedunculate, few-rayed. Invol. ; 



involuccl few-leaved. Fls. minute, white. 



L. di varicatus DC. Umbels (very small) 3 to 5-raycd, lateral aud terminal ; in- 

 volucel lvs. divided, shorter than the very short pedicels ; fr. muricated with short, 

 whitish, erect scales. — Dry saudy soils, S. Car., Ga. Sts. 2 to 8' high. An insig- 

 nificant weed. Mar., Apr. 



30. DISC0PLEU v RA, DC. Bishop-weed. (Gr. diouor, the disk, 

 nXevpd, a rib ; that is, the disk and ribs (of the fruit) united.) Calyx 

 teeth subulate, persistent ; petals ovate, entire, with a minute, inflexed 

 point; fruit ovate, often didymous ; carpels 5 -ribbed, the 3 dorsal ribs 

 filiform, subacute, prominent, the 2 lateral united, with a thick, acces- 

 6ory margin ; intervals with single vitta3 ; seeds subterete. — (D Lvs. ca- 

 pillaceous-dissectcd. Umbels compound. Bracts of the invol. cleft. 

 Fls. white. 



1 D. capillacea DC. Erect or procumbent; umbete 3 to 10-rayed; Ifts. ofih*. 

 invol. 3 to 5, mostly 3-cleft; fr. ovate. — In swamps near the coast, Mass. to Ga, 

 St. much branched, 1 to 2f high. Lvs. very smooth, ternately dissected, with 

 filiform, spreading segm. Umbels axillary and terminal, pedunculate, spreading. 

 Invol. Ifts. about 3, with setaceous segm. Involucels filiform, longer than the um- 

 bellets. Jn. — Sept. (Ammi, Spreng.) 



2 D. costata. Branched, erect; umbels 1 to \a-rayed; bracts of the invol. 10 to 

 12, 2 to 5-partcd; If. -segm. filiform, numerous, apparently verticiUate ; fr. with ribs 

 and viltce strongly contrasted. — Swamps, Ogeechee R. to the Miss., more comrr.on 

 than No. 1, which prevails northward. St. stouter, 1 to 2f high. The corky ribs 

 and persistent sepals conspicuous on tho ovate fruit. Oct., Nov. (Ammi cosuv 

 tum Ell.) 



3 D. Nuttallii DC. Erect, tall; umbels 15 to 20-rayed; invol. few-bracted, 

 brads entire ; fr. as broad as long. — Wet prairies, Ky. to Fla. and La. Sts. 2 to 

 Cf high, branched above. Lvs. few, but with numerous capillaceous segm. In- 

 vol. not half as long as tho rays; involucels minute. Umbels near 2' broad. 



31. HEUROPHYL'LUM, Torr. & Gray. (Gr. revpov, a nerve (vein), 

 rfruXXov, leaf; leaves prominently veined.) Calyx limb of 5 lanceolate, 

 persistent teeth; petals obovate, joint inflexed; stylopodium conical; 

 fruit laterally compressed, ovate; ribs filiform, slight; intervals with 3 

 vitta?, commissure with 4 ; seed teretely plano-convex. — If. Tall, slen- 

 der, smooth. Lvs. ternate, segm. very loYig, linear, entire, 3-veined. 

 Umbels perfect. Invol. to 3-leaved; involuccl 4 to 6-leaved. Fls. 

 white. 



N. longifdlinm Torr. & Gr. Swamps, N. Car. to Fla. (Chapman). St. S to 4f 

 high, branched above, very slender. lit. lvs. 12 to 18' long, the segm. much 

 shorter than the petioles. Umbel 5 to 7 -rayed, rays very slender. Bracts of in- 

 vol. and involuccl subulate, very short. Sept. 



32. SFUM, L. Water Parsnip. (Celtic stw, water ; that is, a 

 genus of aquatic plants.) Calyx margin 5-toothed or obsolete; petals 

 obcordate, with an inflexed point ; fruit nearly oval ; carpels with 5 

 obtusish ribs, and several vitta; in each interval ; carpophore 2-parted. — 

 2f. Aquatic. Lvs. pinnately divided. Umbels perfect, with partial 

 and general many-leaved involucra. Fls. white. 



1 S. Iatifdlium L. St. angular, sulcata; Ifts. oblong-lanceolate, acutely and 

 coarsely serrate, acute; col. teeth elongated. — A tall plant in swamps and ditches, 

 N. J. ? to Ind. and Can. St. 3 to 4f high, smooth, hollow, with deep-furrowed 

 and prominent angles. Lfts. or segm. 4 to 6' lonpr, 1 to 2' broad, in 3 to 5 paira, 

 with a sessile odd one, each with about 10 large, sharp teeth. Umbels very 



